The chiaroscuro-technique developed by painters of the Italian renaissance served to intensify contrasts and effects of optical depth. In Klar/Obskur, I tried to transfer the general idea of this technique on the rather unusual instrumentation of two double-reed woodwinds and piano. On the one hand, a clear, well articulated playing is characteristic for these instruments, on the other hand, they have an often underestimated potential of „twilight“: air-sounds and fragile, shady colours have a e...